Patents Assigned to Bucher Hydraulics AG
  • Patent number: 12088033
    Abstract: An electrical plug forms an electrical plug connection to a coupling that is complementary to the plug. The electrical plug includes a plurality of metal contact elements for electrically contacting an electrical apparatus arranged in a housing, a contact carrier element and a receiving element for receiving the coupling in a receiving space surrounded by the receiving element. The receiving element can be introduced into the housing in a first direction through an opening in the housing. The receiving element, to form the plug, can be brought into engagement in the first direction with the contact carrier element, the contact elements being guided through the contact carrier element and having contact regions which, when the receiving element has been brought into engagement with the contact carrier element, extend into the receiving space, away from the contact carrier element, counter to the first direction.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: September 10, 2024
    Assignee: Bucher Hydraulics AG
    Inventors: Bernhard Laeng, Thomas Huber
  • Patent number: 12062934
    Abstract: A system includes a first, particularly mobile, unit which has a number m of function terminals, a first potential equalization terminal, which is intended to be galvanically connected to a reference potential, an energy source, a power converter, which is fed from the energy source and produces a number m of signals, a switching unit, the signals produced by the power converter being fed to the input side of the switching unit, and the output side of the switching unit being connected to the function terminals, or the input side of the switching unit being connected to the energy source and the output side of the switching unit being connected to the power converter, an insulation monitoring unit, which detects an undesired galvanic connection of a component of the system to the reference potential, and a connection monitoring unit, which monitors whether the first potential equalization terminal is properly electrically connected to a corresponding potential equalization terminal of a second unit to be conn
    Type: Grant
    Filed: March 26, 2021
    Date of Patent: August 13, 2024
    Assignee: Bucher Hydraulics AG
    Inventors: Alex Itten, Bernhard Laeng, Matthias Thurn, Peter Bode
  • Patent number: 11569677
    Abstract: A charging system has: a number of connections for connecting at least one electric energy store to be charged; a number n of at least three inverter bridges, each of which has a center tap; a number n of electric filters, wherein the input of each filter of the number n of filters is electrically connected to a respective corresponding center tap of an inverter bridge of the number of inverter bridges; a controllable assigning unit which is inserted between a respective output of a filter of the number n of filters and the number of connections and which is designed to electrically assign the output of each filter of the number n of filters to a respective corresponding connection of the number of connections depending on at least one actuation signal; and a control unit which is designed to generate the at least one actuation signal depending on a desired charge mode of the charging system.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: January 31, 2023
    Assignee: Bucher Hydraulics AG
    Inventors: Bernhard Laeng, Alex Itten, Benjamin Faessler
  • Patent number: 11091050
    Abstract: A charging station charges an electric vehicle. The charging station has: a housing, a number of first power electronics components and a number of second power electronics components, the second electronics components being different from the first power electronics components, wherein the first power electronics components and the second power electronics components are arranged spatially in the housing, and a first air cooling circuit and a second air cooling circuit separate from the first air cooling circuit. The air cooling circuits are arranged spatially in the housing. The first air cooling circuit serves to cool the number of first power electronics components. The second air cooling circuit serves to cool the number of second power electronics components. The charging station is designed such that a first protection class of at least one region of the first air cooling circuit is higher than a second protection class of the second air cooling circuit.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: August 17, 2021
    Assignee: Bucher Hydraulics AG
    Inventors: Andreas Burgermeister, Dirk Schekulin, Erich Sidler
  • Patent number: 9032861
    Abstract: An arrangement for providing a throttle cross-section for a fluid flow. The throttle cross-section can be varied depending on a pressure difference present across the throttle cross-section. The arrangement is designed such that the polarity of the pressure difference, by which the throttle cross-section can be varied and/or changed. It is thereby possible to use the arrangement for fluid flows that alternate in the flow direction thereof.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: May 19, 2015
    Assignee: Bucher Hydraulics AG
    Inventors: Eneko Goenechea, Josef Zürcher, Silvan Thuerlemann
  • Publication number: 20120125190
    Abstract: An arrangement for providing a throttle cross-section for a fluid flow. The throttle cross-section can be varied depending on a pressure difference present across the throttle cross-section. The arrangement is designed such that the polarity of the pressure difference, by which the throttle cross-section can be varied and/or changed. It is thereby possible to use the arrangement for fluid flows that alternate in the flow direction thereof.
    Type: Application
    Filed: July 6, 2009
    Publication date: May 24, 2012
    Applicant: Bucher Hydraulics AG
    Inventors: Eneko Goenechea, Josef Zürcher, Silvan Thuerlemann
  • Patent number: 7946391
    Abstract: A hydraulic elevator for an elevator shaft having guide rails for an elevator cab. The hydraulic elevator has no machine room and includes an assembly disposed between the guide rails and a tank, a pump mounted in the tank, a motor mounted in the tank for driving the pump, and a control valve unit mounted on the tank and in working relationship with the pump. One of the pump and the motor is disposed above the other of the pump and the motor. The hydraulic elevator further includes a hydraulic drive mounted on the tank, the hydraulic drive being configured to move the elevator cab by a cable; and an emergency operating and monitoring device disposed outside of the elevator shaft and connectable to the control valve unit by a measuring line.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: May 24, 2011
    Assignee: Bucher Hydraulics AG
    Inventor: Richard von Holzen
  • Patent number: 7921879
    Abstract: A pilot valve (3) is designed as a directional control valve in which a control slide (20) is movably disposed in a longitudinal bore (22) of the valve body (21) so as to control the flow of hydraulic oil between two working connecting bores (A, B), a pump connecting bore (P), and a reservoir connecting bore (T). A check valve (32) which is biased with the aid of a bias spring (33) is disposed within the control slide (20). The check valve (32) is connected to an auxiliary control groove (28) via a first transversal bore (29) while being connected to the B-reservoir groove (23) via a second transversal bore (31). The check valve (32) is to be opened from working connecting bore B while the auxiliary control groove (28) is arranged between the B control groove (24) and the B reservoir groove (23) and is delimited on both sides by means of sealing cylindrical areas (35, 36).
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: April 12, 2011
    Assignee: Bucher Hydraulics AG
    Inventor: Markus Eschweiler
  • Patent number: 7752842
    Abstract: Circuit for controlling a double-action hydraulic drive cylinder includes a directional control valve having working ports A and B, a pump port P, and a tank port T, wherein the directional control valve has a neutral position in which pump port P is blocked and working ports A, B are connected to tank port T. A pressure-limiting valve and a controllable load-holding valve are connected to the piston space in parallel, and a regeneration check valve is connected in series between a connection point for the parallel components and the rod space. A first precharge valve is connected between the working port A and the connection point, and a first bypass check valve is connected anti-parallel parallel with the first precharge valve and the load-holding valve. A second precharge valve is connected in series with the directional control valve between the tank port P and the rod space.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: July 13, 2010
    Assignee: Bucher Hydraulics AG
    Inventors: Ivan Hristov, Josef Zürcher
  • Publication number: 20090114482
    Abstract: A hydraulic elevator for an elevator shaft having guide rails for an elevator cab is disclosed. The hydraulic elevator has no machine room and includes an assembly disposed between the guide rails and comprising a tank, a pump mounted in the tank, a motor mounted in the tank for driving the pump, and a control valve unit mounted on the tank and in working relationship with the pump. One of the pump and the motor is disposed above the other of the pump and the motor. The hydraulic elevator further includes a hydraulic drive mounted on the tank, the hydraulic drive being configured to move the elevator cab by a cable; and an emergency operating and monitoring device disposed outside of the elevator shaft and connectable to the control valve unit by a measuring line.
    Type: Application
    Filed: October 13, 2005
    Publication date: May 7, 2009
    Applicant: BUCHER HYDRAULICS AG
    Inventor: Richard von Holzen
  • Publication number: 20090078112
    Abstract: The invention relates to a pilot valve (3) for a hydraulic motor which is used for lifting loads in a device. Said pilot valve (3) is designed as a directional control valve in which a control slide (20) is movably disposed in a longitudinal bore (22) of the valve body (21) so as to control the flow of hydraulic oil between two working connecting bores (A, B), a pump connecting bore (P), and a reservoir connecting bore (T). A check valve (32) which is biased with the aid of a bias spring (33) is disposed within the control slide (20). Said check valve (32) is connected to an auxiliary control groove (28) via a first transversal bore (29) while being connected to the B-reservoir groove (23) via a second transversal bore (31). The check valve (32) is to be opened from working connecting bore B while the auxiliary control groove (28) is arranged between the B control groove (24) and the B reservoir groove (23) and is delimited on both sides by means of sealing cylindrical areas (35, 36).
    Type: Application
    Filed: December 1, 2005
    Publication date: March 26, 2009
    Applicant: Bucher Hydraulics AG
    Inventor: Markus Eschweiler
  • Patent number: 7134528
    Abstract: A hydraulic elevator with a pressure accumulator includes a pump fir conveying hydraulic oil between the pressure accumulator and a hydraulic drive, such that the direction of rotation of the pump can be changed. An electrically controlled cylinder line stop valve is installed on one side of the pump, and an electrically controlled accumulator line stop valve is installed on the other side of the pump. Both valves are ON-OFF valves. To prevent sudden disruptive pressure changes when the valves are opened before the start of travel of the car, the pressure in the section of the line between the pump and the cylinder line stop valve and in the section of the line between the pump and the accumulator line stop valve can be varied such that, when the car is at a standstill, the pressure differences are largely eliminated before the valves are opened.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: November 14, 2006
    Assignee: Bucher Hydraulics AG
    Inventors: Hugo Birbaumer, Richard von Holzen
  • Patent number: 6986409
    Abstract: Apparatus for determining the position of an elevator car in an elevator shaft includes a resistance wire installed vertically in the elevator shaft, the wire having a first end supplied with an operating voltage and a second end supplied with a reference voltage; a voltage tap installed on the elevator car, the voltage tap having a contact which rides on the resistance wire between the ends; and a position sensing unit connected to the voltage tap by a measuring line.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: January 17, 2006
    Assignee: Bucher Hydraulics AG
    Inventor: Hugo Birbaumer
  • Patent number: 6971481
    Abstract: The invention relates to a hydraulic lift comprising a pressure accumulator (17). Hydraulic fluid can be transported between the pressure accumulator (17) and a hydraulic drive (2) by means of a pump (13), the rotational direction of the pump (13) being variable. According to the invention, there is no valve between the pressure accumulator (17) and the pump (13), and means are provided for preventing the pressure accumulator (17) from being discharged when the lift is at a standstill. In terms of said means, either a screw pump is used as a pump (13), or an electrically controllable leakage stop valve (31) is arranged in a leakage line (30) extending from a leakage port of the pump (13) to the tank (21), said stop valve being closed when the lift is at a standstill. The invention enables a hydraulic lift to be operated in an energy-saving and convenient manner, using a simple hydraulic circuit, and prevents the pressure accumulator (17) from being discharged when the lift is at a standstill.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: December 6, 2005
    Assignee: Bucher Hydraulics AG
    Inventors: Daniel Moser, Richard von Holzen
  • Patent number: 6957721
    Abstract: A pump is situated between the hydraulic drive and the accumulator, this pump being driven by a motor and conveying hydraulic oil from the hydraulic drive to the accumulator and vice versa without the presence of control valves which influence the flow of hydraulic oil, such as proportionally pilot-operated valves. Since the pump is subjected to the pressure Pz in the cylinder line and the pressure Ps in the accumulator line, the motor of the pump only has to work against the differential pressure and in certain operating states, can even function as a generator and release electrical energy through a power output device controlling it. The speed of the car is controlled through the control of the motor alone by a control and regulation device, through the power output device.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: October 25, 2005
    Assignee: Bucher Hydraulics AG
    Inventor: Daniel Moser
  • Patent number: 6505711
    Abstract: A hydraulic elevator with a pressure accumulator acting as a counterweight, includes a first pump for conveying hydraulic oil through a pump line, at least one valve unit, and a cylinder line to and from a hydraulic drive for a car, a second pump for conveying hydraulic oil by way of a solenoid valve from and to the pressure accumulator, which hydraulic oil can be supplied to and withdrawn from a tank. The two pumps are connected rigidly to each other and can be driven by an electric motor, the speed of which can be regulated. A single valve unit is installed between the first pump and the hydraulic drive, the valve unit being a relay-controllable valve and a first nonreturn valve connected in parallel to the relay-controllable valve. A control/automatic regulation unit is provided, and in order to control the speed of the car, acts on a power regulating unit for the electric motor, on the solenoid valve, and also, during descents, on the relay-controllable valve.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: January 14, 2003
    Assignee: Bucher Hydraulics AG
    Inventors: Josef Zürcher, Daniel Moser
  • Patent number: 6349743
    Abstract: The present invention relates to a high-pressure hydraulic valve in which the housing (1) at least and also preferably the operational parts, such as the main control piston (3), the manometer piston (6) and the like which are arranged inside said housing (1) and influence the hydraulic oil flow, are made of an aluminium alloy that can be hardened and tempered. The weight of the high-pressure hydraulic valve can therefore be substantially reduced. The surfaces of the parts made of the aluminium alloy that can be hardened and tempered are advantageously submitted to anodic oxidation in order to increase even more their wear resistance. This type of high-pressure hydraulic valve with a particularly light weight is mainly intended for use in mobile hydraulic systems such as those used in mobile cranes, in lifting platforms and in excavators.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: February 26, 2002
    Assignee: Bucher Hydraulics AG
    Inventors: Hans Staiger, Horst Kahl, Markus Eschweiler, Jörg Ludwig